<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="login" method="post">
<h3> 用户登录 </h3>
账号：<input type='text' name="username" ></input><br/><br/>
密码：<input type ="password" name="password" /><br/>
<input type ="submit" value = "登录"  >
</form>
</body>
</html>